Referees need to keep their eyes open at all times. It’s important that they’re aware of where the puck is – along with all twelve players on the ice – at all times.
Sometimes, their attention lapses. Especially when there’s an unexpected rug.
(stick-tap to reddit hockey for the GIF)
You have to think that the referee felt just a little bit bit better when the linesman headed the other way also took a spill.